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MAX1806EUA08+

P1-P3P4-P6P7-P9P10-P10
General Description
The MAX1806 low-dropout linear regulator operates
from a +2.25V to +5.5V supply and delivers a guaran-
teed 500mA load current with low 175mV dropout. The
high-accuracy (±1%) output voltage is preset at an
internally trimmed voltage (see Selector Guide) or can
be adjusted from +0.8V to +4.5V with an external resis-
tive-divider.
An internal PMOS pass transistor allows low 210µA
supply current, making this device ideal for portable
equipment such as personal digital assistants (PDAs),
cellular phones, cordless phones, and other equip-
ment, including base stations and docking stations.
Other features include an active-low, power-OK output
that indicates when the output is out of regulation, a
0.02µA shutdown mode, short-circuit protection, and
thermal shutdown protection. The MAX1806 comes in a
miniature 1.3W, 8-pin power-µMAX package with a
metal pad on the underside of the package.
Applications
Notebook Computers
Cellular and Cordless Telephones
PDAs
Palmtop Computers
Base Stations
USB Hubs
Docking Stations
Features
♦ Guaranteed 500mA Output Current
♦ Output Down to 0.8V
♦ Low 175mV Dropout at 500mA
♦ ±1% Output Voltage Accuracy
Preset at 0.8V, 1.5V, 1.8V, 2.5V, or 3.3V
Adjustable from 0.8V to 4.5V
♦ Power-OK Output
♦ Low 210µA Ground Current
♦ 0.02µA Shutdown Current
♦ Thermal Overload Protection
♦ Output Current Limit
♦ Tiny 1.3W, 8-Pin Power-µMAX Package
MAX1806
500mA, Low-Voltage Linear Regulator in µMAX
________________________________________________________________ Maxim Integrated Products 1
SET
GNDSHDN
1
2
8
7
OUT
OUTIN
POK
IN
µMAX
TOP VIEW
3
4
6
5
MAX1806
Pin Configuration
Ordering Information
NC
MAX1806
IN
C
IN
1µF
C
OUT
10µF
R
POK
100kΩ
V
IN
+2.25V TO +5.5V
ON
OFF
SHDN
OUT
V
OUT
0.8V TO 4.5V
POK
GNDSET
TO
µC
Typical Operating Circuit
19-2018; Rev 0; 4/01
PART T EM P. R A N G E PIN-PACKAGE
MAX1806EUA_ _ -40°C to +85°C 8 Power-µMAX
Selector Guide
PART AND SUFFIX V
OUT
(V) TOP MARK
MAX1806EUA33 3.3 AAAG
MAX1806EUA25 2.5 AAAH
MAX1806EUA18 1.8 AAAI
MAX1806EUA15 1.5 AAAJ
MAX1806EUA08 0.8 AAAK
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX1806
500mA, Low-Voltage Linear Regulator in µMAX
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT(SETPOINT)
+ 500mV or V
IN
= +2.25V whichever is greater, SET = GND, SHDN = IN, T
A
= 0°C to +85°C, unless otherwise
noted. Typical values are at T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN, SHDN, POK, SET to GND ...................................-0.3V to +6V
OUT to GND ................................................-0.3V to (V
IN
+ 0.3V)
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Power-µMAX (derate 17mW/°C above +70°C).......1.3W
Operating Temperature .......................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage V
IN
2.25 5.5 V
Input Undervoltage Lockout V
UVLO
Rising, 40mV hysteresis 1.85 2.0 2.15 V
T
A
= +85°C, I
OUT
= 100mA -1 +1
T
A
= +85°C, I
OUT
= 1mA to 500mA -1.5 +1.5
Output Voltage Accuracy
(Preset Mode)
V
OUT
T
A
= 0°C to +85°C, I
OUT
= 1mA to 500mA,
V
IN
> V
OUT
+ 0.5V
-3 +3
%
Adjustable Output Voltage
0.8 4.5 V
T
A
= +85°C, I
OUT
= 100mA 790 810
T
A
= +85°C, I
OUT
= 1mA to 500mA 786 814
SET Voltage Threshold
(Adjustable Mode)
V
SET
T
A
= 0°C to +85°C, I
OUT
= 1mA to 500mA,
V
IN
> V
OUT
+ 0.5V
774 800 826
mV
Maximum Output Current I
OUT
500 m A
RM S
Short-Circuit Current Limit I
LIM
V
OUT
= 0V 700 1400 2300 mA
SET Dual Mode
™
Threshold 35 80 125 mV
SET Input Bias Current I
SET
V
SET
= +0.8V -100 +100 nA
I
OUT
= 1mA 210 400
Ground-Pin Current I
Q
I
OUT
= 500mA 575
µA
V
OUT
= +2.25V 259 384
V
OUT
= +2.8V 201 315Dropout Voltage (Note 1) I
OUT
= 500mA
V
OUT
= +4.0V 147 255
mV
Line Regulation ∆V
LNR
V
I N
fr om ( V
OU T
+ 100m V ) to 5.5V , I
L OA D
= 5m A 0 0.125 %/V
Load Regulation ∆V
LDR
I
OUT
= 1mA to 500mA 15.5 35 p p m /m A
Output Voltage Noise 10Hz to 1MHz, C
OUT
= 10µF (ESR < 0.1Ω) 300 µV
RMS
SHUTDOWN
Shutdown Supply Current I
OFF
SHD N = GND, V
IN
= 5.5V 0.02 5 µA
V
IH
1.6
SHD N Input Threshold
V
IL
0.6
V
SHD N Input Bias Current I
SHDN
SHD N = GND or IN 10 100 nA
Startup Time T
START
C
OUT
= 10µF, ti m e fr om SHD N hig h to P OK hig h40 µs
Dual Mode is a trademark of Maxim Integrated Products, Inc.
MAX1806
500mA, Low-Voltage Linear Regulator in µMAX
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
OUT(SETPOINT)
+ 500mV or V
IN
= +2.25V whichever is greater, SET = GND, SHDN = IN, T
A
= 0°C to +85°C, unless otherwise
noted. Typical values are at T
A
= +25°C.)
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT(SETPOINT)
+ 500mV or V
IN
= +2.25V whichever is greater, SET = GND, SHDN = IN, T
A
= -40°C to +85°C, unless other-
wise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage V
IN
2.25 5.5 V
Input Undervoltage Lockout V
UVLO
Rising, 40mV hysteresis 1.85 2.15 V
Output Voltage Accuracy
(Preset Mode)
V
OUT
I
OUT
= 1mA to 500mA -4 +4 %
Adjustable Output Voltage
0.8 4.5 V
SET Voltage Threshold
(Adjustable Mode)
V
SET
I
OUT
= 1mA to 500mA 766 834 mV
Maximum Output Current I
OUT
500 m A
RM S
Short-Circuit Current Limit I
LIM
V
OUT
= 0V 700 2500 mA
SET Dual Mode
™
Threshold 35 125 mV
SET Input Bias Current I
SET
V
SET
= +0.8V -100 +100 nA
Ground-Pin Current I
Q
I
OUT
= 1mA 400 µA
V
OUT
= +2.25V 259 384
V
OUT
= +2.8V 201 315
Dropout Voltage (Note 1) I
OUT
= 500mA
V
OUT
= +4.0V 147 255
mV
Line Regulation ∆V
LNR
V
I N
fr om ( V
OU T
+ 100m V ) to 5.5V , I
L OA D
= 5m A -0.175 +0.175 %/V
Load Regulation ∆V
LDR
I
OUT
= 1mA to 500mA 35 p p m /m A
SHUTDOWN
Shutdown Supply Current I
OFF
SHD N = GND, V
IN
= 5.5V 5 µA
V
IH
2.5V < V
IN
< 5.5V 1.6
SHD N Input Threshold
V
IL
2.5V < V
IN
< 5.5V 0.6
V
SHD N Input Bias Current I
SHDN
SHD N = GND or IN 100 nA
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER-OK
POK Output Low Voltage V
OL
Sinking 2mA 5 50 mV
Operating Voltage Range for
Valid POK Output
Sinking 100µA 1.0 5.5 V
Output High-Leakage Current V
POK
= +5.5V 100 nA
Threshold Rising edge, referred to V
OUT(NOMINAL)
90 93 96 %
THERMAL PROTECTION
Ther m al S hutd own Tem p erature T
SHDN
170 °C
Thermal Shutdown Hysteresis ∆T
SHDN
20 °C
P1-P3P4-P6P7-P9P10-P10

MAX1806EUA08+

Mfr. #:
Buy MAX1806EUA08+
Manufacturer:
Maxim Integrated
Description:
LDO Voltage Regulators 500mA
Lifecycle:
New from this manufacturer.
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